Function createDevice

cachelib/allocator/nvmcache/NavySetup.cpp:349–382

} // namespace

std::unique_ptr<navy::Device> createDevice(
    const navy::NavyConfig& config,
    std::shared_ptr<navy::DeviceEncryptor> encryptor) {
  auto blockSize = config.getBlockSize();
  auto maxDeviceWriteSize = config.getDeviceMaxWriteSize();
  if (config.usesRaidFiles() || config.usesSimpleFile()) {
    auto stripeSize = 0;
    auto fileSize = config.getFileSize();
    std::vector<std::string> filePaths;
    if (config.usesSimpleFile()) {
      filePaths.emplace_back(config.getFileName());
    } else {
      stripeSize = getRegionSize(config);
      filePaths = config.getRaidPaths();
      fileSize = alignDown(fileSize, stripeSize);
    }

    return navy::createFileDevice(
        filePaths,
        fileSize,
        config.getTruncateFile(),
        blockSize,
        stripeSize,
        maxDeviceWriteSize > 0 ? alignDown(maxDeviceWriteSize, blockSize) : 0,
        config.getIoEngine(),
        config.getQDepth(),
        config.isFDPEnabled(),
        std::move(encryptor),
        config.getExclusiveOwner());
  } else {
    return navy::createMemoryDevice(config.getFileSize(), std::move(encryptor),
                                    blockSize);
  }
}

std::unique_ptr<navy::AbstractCache> createNavyCache(
    const navy::NavyConfig& config,